303-frameworks-spring-boot-validation SKILL.md skillA
303-frameworks-spring-boot-validation from jabrena/plinth is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jabrena/plinth/303-frameworks-spring-boot-validation@v0.19.0Pins v0.19.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jabrena/plinth
- Path
skills/303-frameworks-spring-boot-validation/SKILL.md- Versions recorded
- 6
- Latest version
- v0.19.0, committed Sep 26, 2026
- First version recorded
- Apr 26, 2026
- Size
- 2,804 bytes
- Repository stars
- 461
- License
- Apache-2.0
Use when you need to design, review, or improve validation in Spring Boot applications — including Bean Validation on request DTOs, @Valid/@Validated at API boundaries, constraint groups, custom constraints, @ConfigurationProperties validation, nested DTO validation, and consistent validation error handling. This should trigger for requests such as Add validation support in Spring Boot; Review Spring Boot validation rules; Improve request validation in Spring Boot REST APIs; Add custom Bean…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Spring Boot Validation Guidelines Apply Spring Boot validation best practices at API boundaries. **What is covered in this Skill?** - Bean Validation annotations on DTOs and command models - @Valid / @Validated on controllers and method parameters - Validation groups for create/update workflows - Custom constraint annotations and validators - Consistent 400 error responses for validation failures **Scope:** Apply recommendations based on the reference rules and good/bad examples. ## Constraints Before applying validation changes, ensure the project compiles. After improvements, run full verification. - **MANDATORY**: Run `./mvnw compile` or `mvn compile` before applying any change - **SAFETY**: If compilation fails, stop immediately - **VERIFY**: Run `./mvnw clean verify` or `mvn clean verify` after applying improvements - **BEFORE APPLYING**: Read the reference for detailed rules and examples ## When to use this skill - Add validation support in Spring Boot - Review Spring Boot validation rules - Improve request validation in Spring Boot REST APIs - Add custom Bean Validation constraints in Spring Boot - Validate configuration properties in Spring Boot …
Read the whole file at its exact version.
How to install
mdr add jabrena/plinth/303-frameworks-spring-boot-validation@sha256:ddf59cb6a5c5cf3bThe line at the top of this page pins the label v0.19.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_7j6ysguityssamc5)
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Versions
The registry has recorded 6 versions of this file, between Apr 26, 2026 and Sep 26, 2026, about one every 31 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.19.0 latest | 2026-09-26 | 9569c35 | 2,804 B | A | view · diff |
| v0.18.0 | 2026-08-01 | 26b0e71 | 2,804 B | A | view · diff |
| v0.17.0 | 2026-07-10 | aaee915 | 2,804 B | A | view · diff |
| v0.16.0 | 2026-06-15 | b73c9d3 | 2,815 B | A | view · diff |
| v0.15.0 | 2026-05-29 | a800339 | 2,815 B | A | view · diff |
| v0.15.0-SNAPSHOT | 2026-04-26 | 899d988 | 2,824 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2804 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
jabrena/plinth · 461 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7j6ysguityssamc5 GET https://markdownregistry.com/api/v1/resolve?ref=jabrena/plinth/303-frameworks-spring-boot-validation GET https://markdownregistry.com/api/v1/blob/ddf59cb6a5c5cf3b6e2a20e2d465eb4eabec3eda04a95d2bf0bf8c5a28a886d9
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